EP2825389B1 - Procédé bidimensionnel d'impression jet d'encre avec orientation de la tête d'impression - Google Patents

Procédé bidimensionnel d'impression jet d'encre avec orientation de la tête d'impression Download PDF

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Publication number
EP2825389B1
EP2825389B1 EP12784442.1A EP12784442A EP2825389B1 EP 2825389 B1 EP2825389 B1 EP 2825389B1 EP 12784442 A EP12784442 A EP 12784442A EP 2825389 B1 EP2825389 B1 EP 2825389B1
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EP
European Patent Office
Prior art keywords
printing
printing module
inkjet printer
positioning
module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP12784442.1A
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German (de)
English (en)
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EP2825389A1 (fr
Inventor
Peter Weingartner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Durst Phototechnik Digital Technology GmbH
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Durst Phototechnik Digital Technology GmbH
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Priority to EP15003629.1A priority Critical patent/EP3025868A1/fr
Publication of EP2825389A1 publication Critical patent/EP2825389A1/fr
Application granted granted Critical
Publication of EP2825389B1 publication Critical patent/EP2825389B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/28—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing downwardly on flat surfaces, e.g. of books, drawings, boxes, envelopes, e.g. flat-bed ink-jet printers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
    • B41J25/003—Mechanisms for bodily moving print heads or carriages parallel to the paper surface for changing the angle between a print element array axis and the printing line, e.g. for dot density changes

Definitions

  • the present invention relates to a method of printing the surface of a medium with ink by means of an ink jet printer.
  • Inkjet printers also called inkjet printing devices
  • Inkjet printers have at least one inkjet print head with at least one row of nozzles arranged side by side over the ink on the surface to be printed can be applied.
  • the printing takes place by the ejection of ink drops according to a predetermined optionally variable drop frequency.
  • the inkjet printhead performs a linear transverse motion, thereby printing one line.
  • the method known in the prior art to print line by line is also called scanning. For inkjet printing to date, only the scanning method is known if the printheads do not extend over the entire width of the medium to be printed.
  • the print head moves only once over the line, this is called the single scan method. If the print head moves several times over the same line, this is called the multiscan method.
  • the multiscan process allows for higher print quality, since the print is made from more than one direction (e.g., bidirectional) and thus so-called "bending problems" can be minimized.
  • a line is finished printed, the medium to be printed is moved by one line perpendicular to the transverse movement performed by the print head in a transport direction and the printing of the next line can begin.
  • monodirectional methods i. the printhead prints only in the transverse movement in one direction and moves back to the beginning of the line when it reaches the end of the line without being printed.
  • bidirectional methods in which after reaching the end of the line, the medium to be printed is shifted by one line and when returning the print head to the starting position already the next line is printed.
  • the resolution is determined by the distance of the droplets applied by the print.
  • the resolution in one dimension may differ from the resolution in the other dimension differ.
  • the resolution along the cross-motion of the printhead is determined by the speed of the printhead and the droplet ejection frequency, while the resolution in the transport direction is determined by the spacing of the nozzles in the nozzle row of the printhead. It should be noted that this resolution can be increased by tilting the nozzle row.
  • inkjet printers Compared to offset printing, the printing speeds of inkjet printers are significantly lower than those of offset printing devices, for example. To increase this printing speed, it is known to provide inkjet printers with a variety of inkjet printheads.
  • a scanning method is known in which a print head comprising a first (nozzle 1) and second (nozzle 6) end is used, wherein in a first step, the print head is moved in a Y direction during which the printing of a first surface takes place a second step, prior to printing on a second surface, positioning and aligning the printhead by rotating it about an axis of rotation by 180 degrees, and in a third step moving the printhead in the opposite Y direction while printing such that the surface which has been printed from the second end of the printhead in a first step and the area printed by the second end in a third step is adjacent to each other.
  • terminal nozzles of a printhead can naturally have different amounts of ink ejection.
  • the adjacent surfaces would be printed with different nozzles, ergo with different ink application, so that under certain circumstances, a "light-emitting deviation" is generated, which is easily perceived.
  • a problem causing the slow printing speed is the fact that in the ink jet printers known today, only one line-by-line printing method described above is realized. There are pictures in which almost every line has areas to be printed and areas not to be printed (free areas). aufweisst. If a nozzle of the printhead is led over an empty area of a line, it will not eject any ink. The resulting frequent idle periods cost a lot of time. This is especially relevant when printing patterns and / or images with characteristic lines and light or dark areas.
  • the present invention has for its object to provide a printing method for ink jet printer, with which the above-mentioned idling phases are largely avoided, whereby the printing speed can be greatly increased.
  • printing cycle summarizes those steps of the printing process which are carried out before and within a drop ejection period.
  • a drop ejection period begins immediately after a drop ejection from a nozzle and ends with the completion of the next subsequent drop ejection from the nozzle.
  • positioning does not only mean the stationary arrangement at a fixed position.
  • positioning should definitely also mean moving over a certain position.
  • orientation refers to the rotation of the nozzle row about the axis of rotation, if such rotation is necessary. If no rotation is necessary to the invention Orientation of the nozzle row is also understood to mean the rotation about 0 ° as alignment.
  • the printhead is thus moved in both dimensions relative to the medium to be printed and essentially sweeps over only those areas which also actually need to be printed. This leads to a strong reduction of the idle phases described above and the printing speed increases many times. Moreover, it does not matter whether in fact only the print head in two dimensions or only the medium to be printed in two dimensions or a combination of the movement of print head and medium is performed. What is essential is only the free relative movement of the print head relative to the surface to be printed, so that the characteristic lines and areas of the image to be printed can be followed.
  • the printing module is designed to be rotatable about an axis, wherein the axis of rotation is substantially perpendicular to the surface of the medium to be printed in the currently to be printed position. In this way, the orientation of the nozzle row of the printhead can be adjusted by rotation of the printhead about the axis of rotation.
  • the print head moves following the characteristic lines of the image to be printed in both dimensions over the surface to be printed and with him the aforementioned axis of rotation, then the actual translational movement of the axis of rotation results in a current feed direction.
  • printing is now carried out in such a way that the nozzle row is aligned during printing in such a way that it maintains a predetermined and preferably constant angle relative to the current feed direction.
  • the ink drop density in the feed direction may of course differ from the ink drop density transversely to the feed direction.
  • the angle of the nozzle row to the feed direction determines the resolution across the feed direction.
  • the feed rate and the print frequency determine the resolution along the feed direction.
  • FIG. 1 For example, the individual steps for printing the edge region of the medium 100 are shown in the representations (SY).
  • SY the representations
  • a control unit controls the electronically deposited image of the inkjet printer.
  • the control unit calculates the optimum printing sequence for a specific image, ie the shortest printing time. This is done by, for example, in a first step, the control unit subdivides the image to be printed into fictitious subregions. In a second step, the arrangement and size of all fictitious subregions of the image is used to calculate a optimal Drucklablaufs according to the method steps a) and b) of the 1, claim considered.
  • the cross points (A1, B1, C1, D1) and the characteristic lines are determined (A1B1, B1C1, ... see FIG. 1 ).
  • the process step a) takes place at a cross point and the process step b) on the characteristic lines.
  • a print head which comprises a nozzle row 107 which maintains a predetermined angle with respect to a current feed direction.
  • the corresponding print head typically comprises at least one row of nozzles per ink color, in each case for the ink colors used.
  • the corresponding print head may be independent for several or each of these nozzle rows each one of the ink color associated angle with respect to the current feed direction can be selected. In this way, different angles - and thus resolutions - can be selected for different ink colors.
  • the printing cycles take place in accordance with a predetermined printing sequence, which deviates from the scanning method.
  • the printing of the at least part of the surface can be done by single scan and / or multiscan.
  • the printing of the at least part of the surface can be monodirectional and / or bidirectional or multidirectional.
  • the positioning and alignment of the printing module 101 according to step a) can take place at the same time or at different times.
  • the movement associated with the positioning of the printing module 101 in step a) can be performed in one, two or three dimensions.
  • the printing process for printing the at least part of the surface may be predetermined, i. the printing process can be taken from a file for a specific image, or is determined by a control unit or a computing unit.
  • control unit or the arithmetic unit divides the at least part of the surface into notional subregions and, in a second step, the parameters of all notional subregions for calculating the pressure run according to method steps a) and b) taken into account.
  • the parameters relate to an arrangement and / or a position and / or a length and / or a width of the fictitious subregions.
  • cross points for method step a) and characteristic lines for method step b) are determined according to which the printing process takes place.
  • An inkjet printer comprises a printing module 101 and a positioning device which is adapted to be able to move the printing module 101 and a medium 100 with a surface to be printed in a predetermined manner at a constant distance of the printing module 101 from the surface in two dimensions relative to each other the printing module 101 comprises at least one print head with at least one nozzle row 107, wherein at the printing module 101 means for rotation 105 of the at least one nozzle row 107 are provided about a rotation axis 103 which is perpendicular to the part of the surface to be printed and by which means 105 for rotation an alignment of the nozzle row 107 can be carried out by rotation, characterized in that the inkjet printer comprises a control unit for carrying out a method according to the invention.
  • the positioning device may comprise a linear guide system, which has at least two guide rails 201 and at least one in the direction of the guide rails provided with guide elements and movably movable crossbar 203, wherein the guide rails 201 are adapted to move the crossbar 203 in a predetermined one-dimensional and bidirectional.
  • the crossbar 203 may comprise a linear guide system comprising at least two guide rails 204 and at least one movable guide carriage 207 provided with guide elements in the running direction of the guide rails 204, wherein the guide rails 204 are adapted to the print carriage 207 relative to the one-dimensional direction of movement of the crossbar 203 in a predetermined manner to move bidirectionally into a second dimension.
  • the carriage 207 may include a linear guide system configured to bidirectionally move the print module 101 and rotation means 105 relative to the direction of movement of the crossbar 203 and print carriage 207 to a third dimension in a predetermined manner such that the height of the print module 101 is relative to the medium 100 is movable in a direction perpendicular to the medium 100 direction movable.
  • the means for rotation 105 may comprise a stepping motor.
  • the positioning device may comprise at least one conveyor belt 209 for transporting the medium 100 below the printing module 101 in at least one transport direction.

Claims (13)

  1. Procédé pour imprimer au moins une partie de la surface d'un support (100) au moyen d'une imprimante à jet d'encre en exécutant une pluralité de cycles d'impression, l'imprimante à jet d'encre comprenant un module d'impression (101) doté d'au moins une tête d'impression qui présente au moins une rangée de buses (107), et chaque cycle d'impression comprenant les étapes suivantes:
    a) Positionnement et alignement du module d'impression (101) avant l'impression, l'alignement s'effectuant par la rotation du module d'impression (101) autour d'un axe de rotation (103) qui est perpendiculaire à la partie à imprimer de la surface.
    b) Positionnement de l'axe de rotation (103) au cours de l'impression de la partie de la surface par éjection de gouttes d'encre,
    le mouvement de translation de l'axe de rotation (103) lié au positionnement dans l'étape b) définissant une direction d'avancement actuelle et le module d'impression (101) étant aligné au cours de l'étape a) d'un cycle d'impression par la rotation autour ledit axe de rotation (103) de sorte que la au moins une rangée de buses (107) de la au moins une tête d'impression présente au cours de l'étape b) un angle prédéterminé et de préférence constant par rapport à la direction d'avancement,
    les cycles d'impression s'effectuant selon un déroulement d'impression prédéterminé qui est différent du procédé de balayage et le procédé étant caractérisé par le fait que le déroulement d'impression pour imprimer au moins une partie de la surface pour une certaine image peut être extrait d'un fichier, ou peut être déterminé par une unité de commande ou une unité de calcul et que l'unité de commande ou l'unité de calcul divise dans une première étape la au moins une partie de la surface en portions fictives et dans une seconde étape tient compte de paramètres de toutes les portions fictives pour calculer le déroulement d'impression selon les étapes a) et b).
  2. Procédé selon la revendication 1 caractérisé par le fait que l'impression de la au moins une partie de la surface s'effectue par le procédé de balayage unique et/ou par le procédé de balayage multiple.
  3. Procédé selon au moins une des revendications précédentes caractérisé par le fait que l'impression de la au moins une partie de la surface s'effectue de manière monodirectionnelle et/ou bidirectionnelle ou multidirectionnelle.
  4. Procédé selon au moins une des revendications précédentes caractérisé par le fait que le positionnement et l'alignement du module d'impression (101) s'effectuent selon l'étape a) simultanément ou à des moments différents.
  5. Procédé selon au moins une des revendications précédentes caractérisé par le fait que le mouvement lié au positionnement du module d'impression (101) dans l'étape a) est exécuté de manière unidimensionnelle, bidimensionnelle ou tridimensionnelle.
  6. Procédé selon la revendication 1 caractérisé par le fait que les paramètres concernent une disposition et/ou une position et/ou une longueur et/ou une largeur des portions fictives.
  7. Procédé selon la revendication 6 caractérisé par le fait que pour calculer le déroulement d'impression des points de croisement pour l'étape a) et des lignes caractéristiques pour l'étape b) sont déterminés selon lesquels l'impression se déroule.
  8. Imprimante à jet d'encre comprenant un module d'impression (101) et un dispositif de positionnement qui est destiné à pouvoir déplacer le module d'impression (101) et un support (100) avec une surface à imprimer de manière prédéterminée dans deux dimensions l'un par rapport à l'autre à une distance constante entre le module d'impression (101) et la surface, le module d'impression (101) comprenant au moins une tête d'impression dotée d'au moins une rangée de buses (107), des moyens de rotation (105) de la au moins une rangée de buses (107) étant prévus au module d'impression (101) autour d'un axe de rotation (103), qui est perpendiculaire à la partie à imprimer de la surface et par quels moyens de rotation (105) un alignement de la rangée de buses (107) peut être exécutée par rotation, caractérisé par le fait que l'imprimante à jet d'encre comprend une unité de commande pour exécuter un procédé selon une des revendications 1 à 7.
  9. Imprimante à jet d'encre selon la revendication 8 caractérisée par le fait que le dispositif de positionnement comprend un système de guidage linéaire qui présente au moins deux rails de guidage (201) et au moins une barre transversale (203) dotée d'éléments de guidage au sens de marche des rails de guidage et qui peut être guidée mobilement, les rails de guidage (201) étant destinés à déplacer la barre transversale (203) de manière prédéterminée, unidemensionnelle et bidirectionnelle.
  10. Imprimante à jet d'encre selon la revendication 9 caractérisée par le fait que la barre transversale (203) comprend un système de guidage linéaire qui présente au moins deux rails de guidage (204) et au moins un chariot d'impression (207) doté d'éléments de guidage au sens de marche des rails de guidage (204) et qui peut être guidé mobilement, les rails de guidage (204) étant destinés à pouvoir déplacer le chariot d'impression (207) par rapport au sens de mouvement unidimensionnel de la barre transversale (203) de manière prédéterminée bidirectionnellement dans une deuxième dimension.
  11. Imprimante à jet d'encre selon la revendication 10 caractérisée par le fait que le chariot d'impression (207) comprend un système de guidage linéaire qui est destiné à pouvoir déplacer le module d'impression (101) et les moyens de rotation (105) par rapport au sens de mouvement de la barre transversale (203) et du chariot d'impression (207) de manière prédéterminée bidirectionnellement dans une troisième dimension de manière que la hauteur du module d'impression (101) par rapport au support (100) peut être modifiée mobilement dans une direction perpendiculaire au support (100).
  12. Imprimante à jet d'encre selon les revendications 8 à 11 caractérisée par le fait que les moyens de rotation (105) comprennent un moteur pas à pas.
  13. Imprimante à jet d'encre selon la revendication 8 caractérisée par le fait que le dispositif de positionnement comprend au moins une bande transporteuse (209) pour transporter le support (100) au-dessous du module d'impression (101) dans au moins une direction de transport.
EP12784442.1A 2012-10-18 2012-10-18 Procédé bidimensionnel d'impression jet d'encre avec orientation de la tête d'impression Active EP2825389B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15003629.1A EP3025868A1 (fr) 2012-10-18 2012-10-18 Procédé bidimensionnel d'impression jet d'encre avec orientation de la tête d'impression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/004353 WO2014060005A1 (fr) 2012-10-18 2012-10-18 Procédé bidimensionnel d'impression jet d'encre avec orientation de la tête d'impression

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EP2825389A1 EP2825389A1 (fr) 2015-01-21
EP2825389B1 true EP2825389B1 (fr) 2016-01-13

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EP15003629.1A Withdrawn EP3025868A1 (fr) 2012-10-18 2012-10-18 Procédé bidimensionnel d'impression jet d'encre avec orientation de la tête d'impression

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US (1) US20150029262A1 (fr)
EP (2) EP2825389B1 (fr)
CN (1) CN104023989B (fr)
BR (1) BR112015008230B1 (fr)
CA (1) CA2888547C (fr)
ES (1) ES2565531T3 (fr)
IL (1) IL237624B (fr)
IN (1) IN2015DN02003A (fr)
MX (1) MX361474B (fr)
WO (2) WO2014060005A1 (fr)

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EP3925786B1 (fr) 2020-06-18 2024-01-10 Heraeus Electronics GmbH & Co. KG Procédé d'impression additive d'un motif d'impression fonctionnel sur une surface d'un objet tridimensionnel, programme informatique associé et support lisible par ordinateur
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CA2888547A1 (fr) 2014-04-24
WO2014060066A1 (fr) 2014-04-24
CA2888547C (fr) 2018-09-04
CN104023989B (zh) 2017-11-03
US20150029262A1 (en) 2015-01-29
BR112015008230B1 (pt) 2021-06-29
EP3025868A1 (fr) 2016-06-01
BR112015008230A2 (pt) 2017-07-04
MX2015004926A (es) 2015-07-21
IN2015DN02003A (fr) 2015-08-14
MX361474B (es) 2018-12-05
IL237624B (en) 2019-09-26
IL237624A0 (en) 2015-04-30
CN104023989A (zh) 2014-09-03
ES2565531T3 (es) 2016-04-05
WO2014060005A1 (fr) 2014-04-24
EP2825389A1 (fr) 2015-01-21

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